4-chlorophenol

4-Chlorophenol is an organic compound with the formula ClC6H4OH. It is one of three monochlorophenol isomers. It is a colorless or white solid that melts easily and exhibits significant solubility in water. Its pKa is 9.37. 4-Chlorophenol is an organic compound with the formula ClC6H4OH. It is one of three monochlorophenol isomers. It is a colorless or white solid that melts easily and exhibits significant solubility in water. Its pKa is 9.37. The commercial dye quinizarin is produced by the reaction of phthalic anhydride and 4-chlorophenol followed by hydrolysis of the chloride. It once was produced on a large scale as a precursor to hydroquinone.